Estudo de diferentes alturas de repicagem na produção de biomassa de porta-enxertos cítricos em sistema hidropônico.

A citricultura brasileira é a mais competitiva do mundo, com produção de 19.112.251 toneladas em 2010/11, sendo o Estado de São Paulo o principal produtor, com safra de laranja (2010/11) em torno de 290 milhões de caixas (AGRIANUAL, 2012). Vários são os fatores levados em consideração na ocasião da implantação de um pomar cítrico, porém, é consenso que a escolha de mudas de qualidade atestada é fator preponderante no sucesso da atividade. Pompeu Júnior (2005) enfatiza que os porta-enxertos afetam diversas características das variedades copas, tais como: vigor, produção e sua precocidade, tolerância da planta às adversidades climáticas, além de característica que conferem maior qualidade ao fruto

Polypropylene meshes coated with chitosan/polyethylene glycol for the reconstruction of the abdominal wall: an experimental study in rats

The aim of this study was to characterize the tissue reactions triggered by the polypropylene mesh coated with chitosan and polyethylene glycol film, and if it's able to prevent the formation of peritoneal adhesions. Defects in the abdominal wall of rats were induced and polypropylene meshes coated with chitosan/polyethylene glycol (CPEG group, n= 12) and uncoated (PP control group, n= 12) were implanted. On the fourth and forty-fifth postoperative day the formation of adhesion and the tissue reaction to the biomaterial was evaluated through histological and histochemical analysis. The area (P= 0.01) and severity (P= 0.002) of the adhesion was significatively less in the CPEG group. On the fourth day the foreign body reaction was less intense in CPEG group (P= 0.018) and the production of collagen fibers was more intense in this group (P= 0.041). The tissue reactions caused by the biomaterials were similar on the 45th day, with the exception of the high organization of collagen fibers in the CPEG group. The CPEG meshes did not fully prevent the formation of adhesions, but minimized the severity of the process. The foreign body reaction promoted by polypropylene meshes coated with CPEG is less intense than that triggered by uncoated polypropylene meshes71411981206CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQCOORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPESFUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESPsem informaçãosem informaçãosem informaçã